Implant device for treating aneurisms of the abdominal aorta

Abstract

An implantation device for the treatment of aneurysms of the abdominal aorta, comprising two complementary elements ( 2, 3 ), each of said complementary elements ( 2, 3 ) in turn comprising: a band-like part ( 2 a , respectively 3 a ) that can be connected to the body part ( 3 a , respectively 2 a ) of the other complementary element so as to give rise to a tubular structure that is able to co-operate with the wall of the abdominal aorta; and a duct part ( 2 b , 3 b ), which extends from the respective body part ( 2 a , 3 a ), said duct part being insertable into the proximal portion of a renal artery (AR 1 and AR 2 ).

1 . An implantation device for the treatment of aneurysms of the abdominal aorta (AA), characterized in that it comprises two complementary elements ( 2 ,  3 ), each of said complementary elements ( 2 ,  3 ) in turn comprising: 
 a band-like part ( 2   a , respectively  3   a ) that can be connected to the body part ( 3   a , respectively  2   a ) of the other complementary element so as to give rise to a tubular structure that is able to co-operate with the wall of the abdominal aorta (AA); and    a duct part ( 2   b ,  3   b ), which extends from the respective body part ( 2   a ,  3   a ), said duct part being insertable into the proximal portion of a renal artery (AR 1  and AR 2 ).    
     
     
         2 . The implantation device according to  claim 1 , characterized in that, in at least one of said complementary elements ( 2 ,  3 ), said body part ( 2   a ,  3   a ) exhibits a complete discontinuity according to a general C-shaped conformation.  
     
     
         3 . The implantation device according to  claim 1  or  claim 2 , characterized in that, in at least one of said complementary elements ( 2 ,  3 ), said body part ( 2   a ,  3   a ) exhibits a partial discontinuity defining, within the respective body part  2 ,  3 , a window-like formation.  
     
     
         4 . The implantation device according to  claim 3 , characterized in that said window-like formation ( 2   c ) is a closed formation.  
     
     
         5 . The implantation device according to  claim 3 , characterized in that said window-like formation ( 2   c ) is a formation open on one side of the respective body part.  
     
     
         6 . The implantation device according to any one of the preceding claims, characterized in that the body parts ( 2   a ,  3   a ) of said complementary elements ( 2 ,  3 ) develop according to cylindrical surfaces.  
     
     
         7 . The implantation device according to  claim 2  or  claim 3 , characterized in that said body parts ( 2   a ,  3   a ) present an angular extension, interrupted by said discontinuity, which is at least marginally greater than 180°.  
     
     
         8 . The implantation device according to  claim 7 , characterized in that said angular extension is in the region of approximately 320°.  
     
     
         9 . The implantation device according to any one of the preceding claims, characterized in that said duct parts ( 2   b ,  3   b ) are placed in a substantially central position with respect to the corresponding body parts ( 2   a ,  3   a ) so that said complementary elements ( 2 ,  3 ) can be connected together both in conditions in which said duct parts ( 2   b ,  3   b ) are diametrically opposite to one another and in conditions in which said duct parts ( 2   b ,  3   b ) are angularly staggered with respect to one another.  
     
     
         10 . The implantation device according to any one of the preceding claims, characterized in that said body parts ( 2   a ,  3   a ) can be selectively connected together in positions of relative longitudinal staggering with respect to the direction of extension of said tubular structure.  
     
     
         11 . The implantation device according to  claim 10 , characterized in that said body parts ( 2   a ,  3   a ) are sized in such a way as to enable a relative longitudinal staggering between said two complementary elements ( 2 ,  3 ) in a range roughly of ±3 cm.  
     
     
         12 . The implantation device according to any one of the preceding claims, characterized in that said body parts ( 2   a ,  3   a ) carry associated stent-type supporting structures.  
     
     
         13 . The implantation device according to any one of the preceding claims, characterized in that it comprises respective stent-type supporting structures associated to the distal margins of said duct parts ( 2   b ,  3   b ).  
     
     
         14 . The implantation device according to any one of the preceding claims, characterized in that said body parts ( 2   a ,  3   a ) are configured in such a way that, in the connecting position, said tubular structure constitutes a supporting and anchoring structure for a further implantation device (G) for channelling of an aneurysm of the abdominal aorta.